Improved shoemaker s jack



NITED STATES PATENT OEEICE.

LEWIS L. COON, OF NUNIOA, MICHIGAN.

ilVIPROVED SHOEMAKERS JACK.

Specification forming part of Letters Patent No. 54,691, dated May 15,1866.

In the different figures the same letters re` fer to idelltical parts.

My improvements relate to the machines known as shoemakers jacks,77wllich are used for lloldillg the last and shoe wllell finishing thesame.

A is the base, which is firmly secured to a work-bench by clamps orotller ordillary and convelliellt llleans. The two blocks B B at--tached to the base contain boxes for the shaft C. The shaft is reducedill size in the lniddle to receive the spiral spring D and the slidingcone E, which is so attached to the shaft as that it may slide forwardalld back, bllt not turn on the shaft. Tile edge of this sliding cone isserrated, and it is held in any desired positioll by the triangulardetents F F passillg thlollgll the pllllllber-block, against the side ofwhich the bas'e of the cone is kept by the sprillg D. By sliding backthe cone E until the teeth are disellgaged the shaft may be revolved asdesired, and when the cone is released it will be forced back by thespring and retailled ill any givell position by the detents F.

To the elld of the shaft (l is rigidly attached the piece G, which has aprojecting point, 1, passillg throllgll the base of the part H, asshowll, and on which the latter turns freely, secured in any desiredposition bythe setscrew N. This part of the jack is composed of threepieces, H, which lies parallel to the line of the shaft C, and has aslot vertical and longitudinal running through one extremity,

receiving the foot of the standard H', which has above apoint, L, fittedto the hole through the heel of the last, and below a teuoll tting theslot ill the part H, and having its base cutaway slightly oblique, asshown by thedotted line in Fig. 1, alld near the side nearest G aprojecting screw, on which operates a nut with a lever, K, by means ot'which the standard H', when the pin L is inserted ill the heel ofthelast and the toe of the same rested upon the toe-standard, may be sodrawll down that the pill L shall bind tightly upon alld firmly retainthe last in place. The toe-standard H is firmly secured to the piece H,andis curved, as sllowll, concluding with the crescent-tbrmeil rest, m,having a leather bearing, m', to receive the toe of the last. The lastbeing secured ill the lnalluer showll, the jack, by means of the twoaxes acting perpendicularly to one another, may be turned in anydirectioll as the worklnan may desire, and the work be placed in anyposit-ion he may wish, as indicated hy the red lines in the drawings.

Having fully explained the nature of my ilnproved jack, what I clailn asmy invention, and seek to secure by Letters Patent, is-

1. The colnbination of the revolving shaft G alld the standard H H Hrevolving at right angles to it, substantially ill the manner alld forthe purpose set forth.

2. So arranging the standard H by means of a base andeccentrically-placed screw that by turning the nut K the last will beheld firmly ill place, substantially ill the mallller set forth.

3. The combination of the spring D, sliding colle E, and detentsF F, forthe purpose of tixillg the position of the shaft C, substantially as setforth.

In testimony whereof I have signed my name to this specification in thepresence of two silbscribing witnesses.

LEWIS L. COON.

Witnesses WILLIAM HATHAWAY, WILLIAM HUMPHREYS.

